| 5651050 |
Ground-to-air telephone calling system and related method for establishing a telephone link between a ground-based caller and a passenger on board an aircraft |
Jai P. Bhagat, William D. Hays |
1997-07-22 |
| 5559862 |
Mobile paging telephone call back system and method |
Jai P. Bhagat, William D. Hays |
1996-09-24 |
| 5438610 |
Method for establishing a communication link between a ground-base caller and a passenger on board an aircraft |
Jai P. Bhagat, William D. Hays |
1995-08-01 |
| 5414750 |
Automated seamless cellular telephone network |
Jai P. Bhagat, David W. Ackerman, William D. Hays |
1995-05-09 |
| 5408515 |
Ground-to-air telephone calling system and related method for directing a call to a particular passenger |
Jai P. Bhagat, William D. Hays |
1995-04-18 |
| 5278891 |
Ground-to-air telephone calling system and related method |
Jai P. Bhagat, William D. Hays |
1994-01-11 |